CH 18: BLOOD VESSELS
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39 Terms
What are the function of blood vessels?
Transport blood to tissues, then to the heart
Regulate blood flow to tissue
Control blood pressure
Secrete chemicals
Function of arteries?
Distribution
Function of Capillaries?
Exchange
Function of Veins?
Collection
What is vasodilation
Vessel diameter increases, cells relaxed, and sympathetic nervous system off
What is vasoconstriction?
Vessel diameter decreases, cells contract, and sympathetic nervouse system is on
Why are vasomotor nerves important?
They help determine blood flow and blood pressure
Has valves: Veins or arteries?
Veins
More compliant (ability to stretech under pressure): Veins or arteries?
Veins
Has thicker tunics, narrow lumen, and higher elasticity/resistance: Veins or arteries?
Arteries
Which arteries are the largest and under high pressure?
Elastic (conducting) arteries
Which arteries are thick-walled, regulate blood pressure, and control flow to organs?
Muscular (distributing) arteries
Characterized by thin walls, con